John beecher cbosby



(No Model.)

J. B. CROSBY.

CARRIAGE BRAKE.

No. 392,910. Patented Nov. 13, 1888.

TA'IES JOHN BEEGHER CROSBY, OF BONSHAW V, PRINCE EDWARD ISLAND, CANADA.

CARRIAGE-BRAKE.

SPECIFICATION forming part of Letters Iatent No. 392,910, dated November13,1888.

Application filed November 1,1887. Serial No. 253,974.

To all whom it may concern.-

Be it known that 1, JOHN BEEOHER CROSBY, of Bonshaw, in Prince EdwardIsland, Dominion of Canada, have invented a certain new and usefulImprovement in Carriage-Brakes, of which the following is a descriptionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification, in which- Figure 1 is a top plan view showing myimproved brake in position for use; Fig. 2, aside elevation of the samewith the whiffietrees re moved; and Figs. 3, 4, and 5, enlarged viewsshowing details of construction.

Like letters and figures of reference indicate corresponding parts inthe difi'erent figures of the drawings.

My invention relates to that class of carriage-brakes which areautomatic in their action or operated by the horses drawing thecarriage, in contradistinction to those which are operated by thedriver; and it consists in a novel construction and arrangement ofparts, as hereinafter more fully set forth and claimed, the object beingto produce a simpler, cheaper, and more effective device of thischaracter than is now in ordinary use.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawings, A represents the forward axle, Bthe forward wheels, andO the pole, of a carriage, these parts being of the ordinary form andconstruction, excepting as hereinafter specified.

A horizontallyarranged doubletree, D, is disposed on the pole O in frontof the wheels B, said tree being fitted to slide longitudinally on thepole by means of a bolt, m, which passes vertically through an elongatedslot, 25, in the pole and secured by a nut, 12. The doubletree D isprovided with whiffletrees E, to which the traces of the harness areattached in the usual manner. A rigid bar, F, is disposed on the pole C,said bar being fitted to slide in bearings v on said pole, and havingits rear or inner end secured centrally to the doubletree (No model.)

D, as shown at w. The outer end of the bar F is provided with a sheaveor truck, d, over which a chain, f, passes, one end of said chain beingsecured to a clip, 9, on the end of the pole, and the other to thehanger h of the yoke G, which is fitted to slide on said pole, andprovided with hooks x for the breechstraps of the harness.

Secured to each end of the doubletree D there are two plates, H,provided with corresponding forwardly-curved slots, r, and dis-v posedbetween each pair of said plates there is a brakeshoe, J, adapted toengage the wheel B, and concaved on its face to correspond with theperipheral contour of the wheel. A horizontally-arranged bolt, 13, issecured to each of said shoes, the ends of said bolts projecting intothe curved slots r in the plates H and constituting trunnions on whichthe shoes are pivoted, thereby adapting said shoes to rock and alsoslide diagonally upward between said plates.

In the use of my improvement the traces or lugs of the harness aresecured to the hooksz on the whiffietrees E and the breechingstraps orholdbacks to the hooks to on the yoke G. The horses being harnessed tothe carriage, as

described, and the carriage descending a hill,

if now it is desired to apply the brake, the horses are so reined as tocause the breechingstraps to slide the yoke G toward the wheels B,thereby pulling on the chain f, forcing the bar F and doubletree towardthe axle A, and causing the shoes J to press against the wheels B andapply the brake to the carriage in a manner which will be readilyunderstood by all conversant with such matters without furtherexplanation.

In applying the brake it will be obvious that as long as the carriagecontinues to advance or the wheels to revolve in the direction of theirarrow the bolts 6 will remain in the lower portion of the slots 7 andthe shoes J will wedge between the plates H and the wheels B, therebyeffectually braking the carriage; but when the horses are backedsufficiently to cause the wheels to revolve in the opposite directionthe bolts z will slide upward in the slots r and the shoes J bedisengaged from the wheels B, thereby permitting the carriage to bebacked without interference from the brake. It will thus be seen thatthe brake is automatic in its operations, being actuated by the horsesindependently of the driver, excepting as guided by him in the ordinarycourse of driving them.

Having thus explained my invention, what I claim is- 1. In acarriage-brake of the character described, the combination of thefollowing instrumen talities,to wit: an axle, wheels mounted on saidaxle, a pole, a doubletree fitted to slide on said pole adjacent to saidwheels and provided with whiffletrees, slotted plates mounted on theends of said doubletree, brake-shoes fitted to slide in said slottedplates and adapted to engage said wheels, a yoke fitted to slide on saidpole near its forward end and provided with hooks for thebreeching-straps, and a bar fitted to slide on 20 said pole, said barbeing connected with said yoke and said doubletree, substantially as setforth.

2. The improved carriage-brake herein described, the same consisting,essentially, of the pole 0, provided with the slot t, the slidingdoubletree D, provided with the bolt m and nut b, the Whiffletrees E,provided with the hooks z, the plates H, provided with the curved slots4" and mounted on said doubletree, the shoes J, provided with thebolts'i and fitted to slide between said plates, the yoke G, having thehooks w and fitted to slide on the pole G, the bar F, connected with thedoubletree and fitted to slide on said pole, said bar being providedwith the'sheave d, and the chain f, passing over said sheave andconnected at one end to said bar and at the other to said pole, allbeing constructed, combined, and arranged to operate substantially asdescribed. H

JOHN BEECHER CROSBY. Witnesses:

H. llIAODONALD,

Attorney at Law. KENNETH I. MARTIN,

Student at Law.

